anova1way.F.bal: Power calculation for balanced one-way ANOVA omnibus F test

In powertools: Power and Sample Size Tools

Power calculation for balanced one-way ANOVA omnibus F test

Description

This function performs power and sample size calculations for the overall (omnibus) F test in a balanced (equal-sized groups) one-way analysis of variance (ANOVA). Can be used to solve for power, n (sample size per group), or alpha. For an unbalanced one-way ANOVA F test (that is, unequal group sample sizes), use 'anova1way.F.unbal'. For contrast tests in a one-way ANOVA, see 'anova1way.c.bal' and 'anova1way.c.unbal'.

Usage

anova1way.F.bal(
  n = NULL,
  mvec = NULL,
  sd = 1,
  Rsq = 0,
  ncov = 0,
  alpha = 0.05,
  power = NULL,
  v = FALSE
)

Arguments

n	The sample size per group.
mvec	A vector of group means c(mu1, mu2, ...).
sd	The estimated standard deviation within each group; defaults to 1.
Rsq	The estimated R^2 for regressing the outcome on the covariates; defaults to 0.
ncov	The number of covariates adjusted for in the model; defaults to 0.
alpha	The significance level or type 1 error rate; defaults to 0.05.
power	The specified level of power.
v	Either TRUE for verbose output or FALSE to output computed argument only.

Value

A list of the arguments (including the computed one).

Examples

anova1way.F.bal(n = 20, mvec = c(5, 10, 12), sd = 10)
anova1way.F.bal(n = NULL, mvec = c(-0.25, 0.25), sd = 1, Rsq = 0.5^2, ncov = 1, power = 0.8)

powertools documentation built on April 4, 2025, 5:02 a.m.